linux-kernel - Re: [PATCH] tracing: Do not synchronize freeing of trigger filter on boot up

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Message-ID: <20221218002903.GM4001@paulmck-ThinkPad-P17-Gen-1>
Date:   Sat, 17 Dec 2022 16:29:03 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Trace Kernel <linux-trace-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Subject: Re: [PATCH] tracing: Do not synchronize freeing of trigger filter on
 boot up

On Fri, Dec 16, 2022 at 06:08:10AM -0500, Steven Rostedt wrote:
> On Thu, 15 Dec 2022 20:40:22 -0800
> "Paul E. McKenney" <paulmck@...nel.org> wrote:
> 
> > On Thu, Dec 15, 2022 at 05:01:18PM -0800, Paul E. McKenney wrote:
> > > On Thu, Dec 15, 2022 at 06:42:02PM -0500, Steven Rostedt wrote:  
> > > > On Thu, 15 Dec 2022 15:10:27 -0800
> > > > "Paul E. McKenney" <paulmck@...nel.org> wrote:
> > > >   
> > > > > The nice thing about the current placement of rcu_scheduler_starting()
> > > > > is that there is not yet any other task to switch to.  ;-)  
> > > > 
> > > > Fair enough. Anyway the last patch appears to do the job.
> > > > 
> > > > Reported-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> > > > Tested-by: Steven Rostedt (Google) <rostedt@...dmis.org>  
> > > 
> > > Applied, thank you!  
> > 
> > And I should have checked up on urgency.  Normal process would hold this
> > one until the v6.3 merge window, but please let me know if you would
> > like it in v6.2.  It is after all a bug fix.
> > 
> 
> Yes, any fix that fixes a lockdep splat is considered urgent and should be
> pushed ASAP. As it makes finding other lockdep splats more difficult (as
> the first splat shuts down lockdep).
> 
> Please send this during the merge window, as I have to carry it internally
> until it makes it into mainline.

This is now rebased and marked with tag rcu-urgent.2022.12.17a.
If testing goes well, I will send it by the middle of next week.

							Thanx, Paul